Like Tecafine PP, stamped washers and parts made from HDPE and LDPE have excellent resistance to acids and bases, and while their upper service temperature is not as good as PP, the low temperature toughness is notably better. Washers and spacers from these materials work well in outdoor service applications. Markets like winter sporting goods, building and construction, and refrigerator components value the low temperature impacts. LDPE will have better stress crack resistance then HDPE.
- Broad chemical compatibility
- Easy to machine
- Good impact strength
- Low moisture absorption
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| Properties | Condition | Value | Test Method | Comment | ||
|---|---|---|---|---|---|---|
| Mechanical | Modulus of elasticity (tensile test) | @ 73°F | 130,000 | psi | ASTM D 638 | |
| Tensile strength at break | @ 73°F | 4,700 | psi | ASTM D 638 | ||
| Elongation at break | @ 73°F | 100 | % | ASTM D 638 | ||
| Flexural strength | @ 73°F | 6,000-8,000 | psi | ASTM D 790 | ||
| Modulus of elasticity (flexural test) | @ 73°F | 180,000 | psi | ASTM D 790 | ||
| Notched impact strength (Izod) | @ 73°F | 0.9 | ft-lbs/in | ASTM D 256 | ||
| Rockwell hardness | R Scale | 90 | ASTM D 785 | |||
| Thermal | Melting temperature | 330 | °F | 1) | 1) Per ASTM D3418 | |
| Deflection temperature | @ 264 psi | 130 | °F | ASTM D 648 | ||
| Thermal expansion (CLTE) | 5*10-5 | in/in/°F | ASTM D 696 | |||
| Electrical | Volume resistivity | @ 73°F | 1*1017 | Ω*cm | ASTM D 257 | |
| Dielectric constant | @ 60 Hz, 73°F, 50% RH | 2.2 | ASTM D 150 | |||
| Other | Moisture absorption | @ 24 hours, 73°F | 0.01-0.03 | % | ASTM D 570 | |
| Flammability (UL94) | HB | – | ||||
| This information is only to assist and advise you on current technical knowledge and is given without obligation or liability. All trade and patent rights should be observed. All rights reserved. Data obtained from extruded shapes material. TECAFINE ™ PP – Ensinger Industries, Inc. |
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Mechanical
Property: Modulus of elasticity (tensile test)
Condition: @ 73°F
Value: 130,000 psi
Test Method: ASTM D 638
Comment: –
Property: Tensile strength at break
Condition: @ 73°F
Value: 4,700 psi
Test Method: ASTM D 638
Comment: –
Property: Elongation at break
Condition: @ 73°F
Value: 100 %
Test Method: ASTM D 638
Comment: –
Property: Flexural strength
Condition: @ 73°F
Value: 6,000-8,000 psi
Test Method: ASTM D 790
Comment: –
Property: Modulus of elasticity (flexural test)
Condition: @ 73°F
Value: 180,000 psi
Test Method: ASTM D 790
Comment: –
Property: Notched impact strength (Izod)
Condition: @ 73°F
Value: 0.9 ft-lbs/in
Test Method: ASTM D 256
Comment: –
Property: Rockwell hardness
Condition: R Scale
Value: 90 –
Test Method: ASTM D 785
Comment: –
Thermal
Property: Melting temperature
Condition: –
Value: 330 °F
Test Method: 1)
Comment: 1) Per ASTM D3418
Property: Deflection temperature
Condition: @ 264 psi
Value: 130 °F
Test Method: ASTM D 648
Comment: –
Property: Thermal expansion (CLTE)
Condition: –
Value: 5*10-5 in/in/°F
Test Method: ASTM D 696
Comment: –
Electrical
Property: Volume resistivity
Condition: @ 73°F
Value: 1*1017 Ω*cm
Test Method: ASTM D 257
Comment: –
Property: Dielectric constant
Condition: @ 60 Hz, 73°F, 50% RH
Value: 2.2 –
Test Method: ASTM D 150
Comment: –
Other
Property: Moisture absorption
Condition: @ 24 hours, 73°F
Value: 0.01-0.03 %
Test Method: ASTM D 570
Comment: –
Property: Flammability (UL94)
Condition: –
Value: HB –
Test Method: –
Comment: –
This information is only to assist and advise you on current technical knowledge and is given without obligation or liability. All trade and patent rights should be observed. All rights reserved. Data obtained from extruded shapes material. TECAFINE ™ PP – Ensinger Industries, Inc.